how to self inject vitamin b12 Patients self-injecting sourced online, finds study Safe B12 Injection Guide at

How is the cause of Vitamin B12 deficiency determined

Other lipotropic injection side effects include: Headaches and light headedness Stomach upsets such as mild nausea and mild diarrhea Allergic reactions (itching, hives, shortness of breath, wheezing, swelling of the tongue, throat, or mouth) although rare, can also occur

Simeons in the 1950s

If a pregnant patient has a documented deficiency of one or more B vitamins or a condition like hyperemesis that prevents oral intake, the benefits of correcting the deficiency (preventing serious maternal and fetal complications) outweigh any minimal risk from the injection

J Appl Physiol